Analysis of the Influencing Factors of Changes in Foxtail Millet Planting Area in Hebei Province

Since reform and open to the outside world,foxtail millet planting area in Hebei Province has constantly reduced,and its planting region has changed from the whole province into some regions,with obvious changes. In this paper,by using qualitative and quantitative approaches like chart analysis,summarizing,Delphi method and osculating value model,the influencing factors of changes in millet growing region in Hebei Province were studied. The results showed that the changes of millet planting area were closely related to many factors,such as little investment in scientific research,weak policy support,a single consumer product demand,the rapid development of other staple crops, labor migration,relatively low comparative effectiveness and physiological characteristics of the millet itself. Then some suggestions were put forward,such as increasing research support,strengthening scientific research strength,researching and developing deeply processed products, expanding consumer groups,improving millet policy support,providing subsidies for planting the improved varieties,researching and developing various types of machinery,and increasing millet production technology training.

Effects of Different Modes of Returning Farmland to Forest on Physicochemical Properties of Soil in Bashang Area of Northern Hebei Province

[Objective]The research aimed to understand the change rules of physicochemical properties of soil in the different modes of returning farmland to forest.[Method]The physicochemical properties of soil in three different types of returning farmland to forest(Hippophae rhamnoides Linn.forest,Caragana korshinskii forest and Ulmus pumila L.forest)were analyzed by taking the enclosed grassland as comparison in Bashang area of northern Hebei Province.[Result]The results showed that there were significant differences among different types.Order of the bulk density of soil:H.rhamnoides Linn.forest(1.17 g/cm^3)<U.pumila L.forest(1.24 g/cm^3)<C.korshinskii forest(1.26 g/cm^3)<enclosed grassland(1.61 g/cm^3);order of the total porosity of soil:H.rhamnoides Linn.forest(55.29%)>U.pumila L.forest(52.55%)>C.korshinskii forest(51.93%)<enclosed grassland(38.85%);order of the organic matter content of soil:H.rhamnoides Linn.forest(3.191%)>C.korshinskii forest(3.128%)>U.pumila L.forest(2.804%)>enclosed grassland(2.536%).[Conclusion]After returning farmland to forest,vegetation played a positive role in physicochemical properties of soil.There were significant differences in physicochemical properties of soil among different modes of returning farmland to forest,and the improvement effect of H.rhamnoides Linn.forest on physicochemical properties of soil was the best.

The Analysis of Limitation of Engel's Coefficient——A Case Study of Rural Areas in Hebei Province

On the basis of introducing relevant theories of Engel's coefficient,this paper analyzes the limitation of these theories in practical application currently in China,for example,continuing to use original theory,not in line with reality of China;comparison invalidity in length and breadth,is not conducive to relevant analysis;culling out the special factors easily causes distortion of conclusion.Taking rural areas in Hebei Province as an example,this paper analyzes the limitation of Engel's coefficient in analyzing the gap of rural economy:in terms of region horizontally,Engel's coefficient neglects the difference of consumption structure among regions,and difference of economic stages among regions;in terms of time vertically,Engel's coefficient neglects the periodic change of consumption structure and the ratio change of different families in different periods.According to the reality of China's rural areas,the correction model of Engel's coefficient is established as follows.Firstly,Engel's coefficient=Percentage of expenditure variation(food+ education+ medical service) /Percentage of total expenditure variation;Engel's coefficient=Percentage of expenditure variation(food+ education+ medical service) /Percentage of income variation.Secondly,Engel's coefficient=Percentage of expenditure variation of food/Percentage of variation of(total expenditure educational expenditure-medical expenditure.Thirdly,Engel's coefficient=Percentage of expenditure variation of food/Percentage of total expenditure variation.

Process and mechanism of arable land change in Hebei Province during the past 50 years

Hebei Province is one of the regions with most densely population, fastest economic growth and most intensive land use in China. The contradiction of land shortage sharpened by high-speed economic development with population growth has become a serious problem, which has restricted regional sustainable development.This paper revealed the basic process, regional differences of change and the gravity center of arable land area according to the long-series statistical data of arable land during the past 50 years. On the basis of the above mentioned, the major driving forces that influence the changes of the arable land are discussed. The research results indicate that there is a trend of obvious fluctuating decrease in arable land area during the last 50 years. The changes of arable land area undergo the process from increase to sharp decrease to gently decrease. The regional disparity of change in arable land area is very notable and the gravity center of arable land area moves to the northeast 49.22 km. Regarding the decrease in arable land, the direct driving forces include adjustments of agricultural structure and reclamation, and indirect driving forces include advance in technology, economic interest and population growth etc.

Terrestrial water storage variation in Hebei plain area of China,based on ground surface gravimetry

Variation of terrestrial water storage in the Hebei plain area from March 2010 to June 2014 was studied using ground gravimetry combined with vertical displacement data from the Global Navigation Satellite System.Results show that observed gravity variation in this area increased continuously,basically reflecting a trend toward land subsidence.With the effect of this subsidence removed,a dominantnegative change in gravity variation was evident,reflecting an average rate of decrease in terrestrial water in this area of 0.10±0.053 m/y,and this is equivalent to a volume of 81.5±43.2×108 m^(3)and is consistent with the spatial distribution of groundwater change from measured hydrologic data.These results can be an essential reference and supplement for the study of terrestrial water variation in the Hebei plain area,and indicate that ground surface gravimetry can be used as an important mean for studying changes in terrestrial water.

Analysis on Temporal and Spatial Changes and Driving Forces of Poverty-Stricken Areas in Hebei Province

This paper takes poverty-stricken countyas the basic unit, and selects net income per peasantto study the poverty status in Hebei Province during1986~2000.Temporal and spatial changes of poverty-stricken areas are analyzed. The result shows thatpoverty-stricken areas in Hebei Province distributedconcentratedly and the areas decreased during1986~2000, the net income per peasant was on therise with an increasing speed in off-poverty countiesbeing slightly higher than that in poverty-strickencounties, but the growth rate was extremely unstable,rising slowly in off-poverty counties while droppingin poverty-stricken counties. The main driving forcesthat influenced temporal and spatial changes wereeconomic development of the whole province,ecological environment quality, infrastructureconditions and radiation of the key city. On thisbasis, some anti-poverty countermeasures suitable tolocal conditions are proposed.

Metabasic Dyke Swarms in a High-Grade Metamorphic Terrane——A Case Study in the Taipingzhai-Jinchangyu Area,Eastern Hebei Province

Geological and petrological studies indicate that three phases of metabasic dykes are present in theTaipingzhai-Jinchangyu area within the high-grade metamorphic terrane of eastern Hebei. Garnet andhornblende in metabasic dykes of the second and third phases occur separately, forming two mineral aggregateareas gl+cpx+pl±hy and hb+cpx+pl-hy. P_(H_2O) in the rocks appears to be the main factor controlling theformation of the two aggregate areas. Both were formed simultaneously at the same metamorphic temperature. The second-phase basic dykes underwent metamorphism of pyroxene-granulite facies at a temperature ofsome 825C: later the dykes, together with the third-phase basic dykes experienced metamorphism ofamphibole-granulite facies at a temperature of about 750C under pressure of 0.9GPa.

Problems and reconstruction of the development of rural preschool education in Hebei Province

as a part of the socialist education, preschool education is an opportunity for every school age children to have equal access to education. But in the current development of market economy, now rural preschool education appeared a series of problems. In combination with the basic characteristics of rural preschool education in our province, hope the popularity ofpre school education in rural and other areas to achieve the integration of urban and rural areas play a reference

冀北上黄旗地区多金属矿成矿规律与矿产预测

冀北上黄旗地区位于华北地台北缘中段成矿带及兴安太行南段成矿带的相交区域,是华北地区著名的(银)多金属成矿区。本文在综合分析区域成矿地质背景、成矿地质条件、地球物理、地球化学、遥感异常特征及成矿规律的基础上,认为该区具有寻找侵入岩型和陆相火山岩型两大类多金属矿床的有利条件,划分出3条Ⅳ级成矿亚带,圈定成矿远景区10个。其中,A类4处,B类4处,C类2处;并优选出多金属矿找矿靶区7个,A类4个,B类2个,C类1个。

Impact of the shrinking winter wheat sown area on agricultural water consumption in the Hebei Plain

This study firstly analyzed the shrinkage of winter wheat and the changes of crop- ping systems in the Hebei Plain from 1998 to 2010 based on the agricultural statistic data of 11 cities and meteorological data, including daily temperature, precipitation, water vapor, wind speed and minimum relative humidity data from 22 meteorological stations, and then calcu- lated the water deficit and irrigation water resources required by different cropping systems, as well as the irrigation water resources conserved as a result of cropping system changes, using crop coefficient method and every ten-day effective precipitation estimation method. The results are as follows. 1） The sown areas of winter wheat in the 11 cities in the Hebei Plain all shrunk during the study period. The shrinkage rate was 16.07% and the total shrinkage area amounted to 49.62×10^4 ha. The shrinkage was most serious in the Bei- jing-Tianjin-Tangshan metropolitan agglomerate, with a shrinkage rate of 47.23%. 2） The precipitation fill rate of winter wheat was only 20%-30%, while those of spring maize and summer maize both exceeded 50%. The irrigation water resources demanded by the winter wheat-summer maize double cropping system ranged from 400 mm to 530 mm, while those demanded by the spring maize single cropping system ranged only from 160 mm to 210 ram. 3） The water resources conserved as a result of the winter wheat sown area shrinkage during the study period were about 15.96×10^8 m^3/a, accounting for 27.85% of those provided for Beijing, Tianjin and Hebei by the first phase of the Mid-Route of the South-to-North Water Diversion Project.

海域资源资产收益管理和分配研究——以河北省为例

健全完善海域资源资产收益管理和分配制度是自然资源资产产权制度改革的关键环节,也是全民所有自然资源资产所有权委托代理机制试点工作的重点内容。文章系统梳理了海域资源资产收益来源、收益形式、收益征收管理和分配现状,并以河北省为例,探讨了当前海域资源资产收益管理与分配中存在的问题:①资产配置以行政手段为主,市场化水平不高;②海域使用金征收标准偏低,资产收益实现形式单一;③资产收益分配不合理,央地财政事权划分不匹配。基于此,文章提出在分级行使海域资源资产所有权模式下完善收益管理和分配制度的对策建议:①深化海域有偿使用制度改革;②完善海域资源资产收益管理路径,合理划分财权事权;③强化预算管理;④建立收益管理成效评价机制。

冀东迁安地区BIF型铁矿地质特征及成因探讨

冀东迁安地区是我国重要的BIF型铁矿集区之一。随着铁矿床开发利用程度的提高,浅部铁矿资源开发殆尽。近年来,多家地勘单位在迁安地区大中型铁矿床深部及外围进行找矿工作,在深部新发现了厚大矿体,取得了找矿突破。虽然勘查取得一定的成果,但相关的铁矿床分布规律及成矿模式未进行过系统的研究,对迁安地区成矿带缺少整体认识。本文系统分析了迁安地区沉积变质型铁矿的成矿地质条件,总结了赋矿地层特征。进行了迁安地区铁矿褶皱构造五级划分,确定三级倒转向斜构造为主要控矿构造。初步厘定了断裂构造为成矿期后的脆性断裂,多对矿体产生破坏和错断;明确了迁安地区铁矿分布在迁安隆起向南西突出的“C”字形边缘弧形褶皱带中,形态受倒转向斜控制。针对迁安部分矿区发现的第二层铁矿体,进行了深、浅部矿体地质特征对比分析,认为海底热液喷气活动具有周期性,原始沉积时形成了多层铁矿层,并经受成矿期后断裂构造改造,形成北高南低的阶梯状地堑赋矿模式。依据多年的勘探成果结合本次研究工作,建立了迁安地区成矿模式,为下一步找矿工作提供了理论支撑。

河北省典型铅锌矿区重金属来源解析及生态风险评价

为揭示河北省典型铅锌矿区重金属来源及生态风险,以河北省某铅锌矿区周边区域为研究对象,通过系统的田间采样采集了156件土壤样品,通过主成分分析(PCA)及正定矩阵因子分解(PMF)模型分析,分析了区域内重金属的来源;运用地累积指数法及潜在生态风险指数法进行了风险评价。研究结果表明,Cr,Ni,Cu,Zn,As,Cd,Pb和Hg质量分数平均值分别为53.6,25.7,62.7,692,10.6,1.75,142,0.129 mg/kg,除Cr,Ni和As外,其余5种重金属均处于不同的污染水平,平均值均超河北省土壤背景值,Hg,Cd,Zn,Pb和Cu的变异系数均大于1.75,As的变异系数大于0.5,表明这6种重金属属于高度变异。源解析显示,研究区土壤重金属的主要来源为采矿活动、自然来源、农业活动和金矿冶炼,其中,Pb,Zn和Cd主要源于采矿活动;Cr,Ni主要受自然母质的影响,属于自然来源;Cu主要受农业活动和采矿活动的双重影响;As受自然来源、采矿活动和农业活动三重控制;Hg主要源于金矿冶炼和采矿活动。PCA与PMF模型有机结合、彼此印证,增加了重金属来源解析结果的可信度。研究区存在人为因素引起的Hg和Cd污染,地累积指数和潜在生态风险指数高,生态风险总体属于极高生态风险,需要重点关注并开展治理工作。

冀北山地桦木林土壤细菌群落特征对坡向的响应

为了揭示冀北山地桦木林土壤细菌群落特征对坡向的响应规律,以冀北山地阴坡、半阴坡和半阳坡桦木林土壤为研究对象,采用高通量测序技术,分析了土壤细菌群落结构和多样性。结果表明:细菌群落组成主要包含41门、107纲,其中优势细菌门为变形菌门和酸杆菌门;土壤细菌群落α多样性指数在坡向间存在显著差异,阴坡>半阴坡>半阳坡;土壤含水量、容重、硝态氮和氨态氮均影响细菌微生物群落的结构组成,其中,土壤含水量与多种细菌门存在显著相关性,且与细菌α多样性存在极显著的正相关性。综上所述,不同坡向桦木林土壤细菌群落结构和多样性呈现出一定的变化规律,坡向和土层深度变化引起的土壤含水量变化是该地区桦木林土壤细菌群落结构和多样性差异的主要因素。

基于域—生物群系—功能群分类的生态系统类型识别及时空格局变化分析——以河北省太行山区为例

[目的]科学识别河北省太行山区生态系统类型,是理解河北省太行山区生态系统时空分布格局和支撑生态系统分类管理的基础。[方法]基于域—生物群系—功能群(RBE)的分类原理,构建了包括3个1级,8个2级和24个3级类的生态系统分类体系,并集成多源数据,开展了2000和2020年的河北省太行山区生态系统的分类制图。基于RUSLE模型、InVEST模型和热点分析等方法,分析生态系统服务的时空格局演变。[结果]①河北省太行山区20 a间建设用地生态系统增加最多,主要来自农田生态系统。农田生态系统缩减了61105.95 hm^(2),以雨养农田为主。受人类活动的影响,河流和人工湿地面积分别增加了5584.32和2535.66 hm^(2),而林地和草地生态系统减幅分别为0.96%和8.18%。未利用地生态系统受研究区生态保护措施影响减少5800.68 hm^(2)。②生态系统服务值受生态系统类型分布影响总体呈现西高东低的分布格局,除粮食供给服务为西低东高,主要是由于农田主要分布在东部地区。③冷热点区域空间分布整体上具有重叠性,但仍有差异。[结论]提出的分类体系具有可行性,分类精度达到80%以上,符合研究区的生态系统类型变化趋势,可为识别山区生态系统分类和生态系统保护修复政策提供科学支撑,进而促进山区生态发展目标和可持续发展的实现。

典型流域河流相粉质黏土层物理力学指标相关性分析

基于辽宁省辽阳市平原区不同地点、不同深度粉质黏土的土工试验结果,采用一元线性回归分析,对粉质黏土16种物理力学指标的变异性及相互间关系进行数理统计.研究结果表明:1)不同深度、不同地点的土质类型主要是粉质黏土,其含水率较高,且多呈湿、可塑状态;2)粉质黏土湿密度、天然重度、土粒比重、饱和度、孔隙率、液限、塑限7种物理指标的变异系数均较小,压缩系数、压缩模量、黏聚力、内摩擦角4种力学指标的变异系数较大;3)粉质黏土湿密度与天然重度、液限与塑性指数具有良好的线性关系.

河北省张北地区土壤和莜麦重金属含量及健康风险研究

为探讨河北省张北地区土壤和莜麦中重金属元素含量及健康风险,选择17个适宜采样点进行表层土壤和莜麦籽实样品的采集,通过单因子污染指数法、综合污染指数法和富集系数分别对土壤质量和重金属元素从土壤向莜麦迁移能力进行研究。结果表明:研究区土壤和莜麦中重金属含量远低于国家标准,品质安全健康;区内重金属元素在土壤-莜麦系统中富集能力为Zn>Cu>Ni>Cd>As>Pb>Cr=Hg, Ni、Cu和Zn的富集系数远高于Cr、As、Cd、Hg、Pb, Cd迁移能力很弱,As、Pb几乎不发生迁移,Cr、Hg不发生迁移。

河北省海水养殖业存在的问题与建议

从河北省渔业产业、海水养殖面积、产量、产值等分析对比海水养殖业现状,提出当前存在着基础设施及行业发展落后、疾病防控手段不足、科研力量薄弱、水产动物健康和配合饲料普及率不高、产业结构不合理等问题,并提出相应建议:建立无公害防病及灾害防御机制,研制高效专用配合饲料,加大技术支撑及政策支持,转变养殖方式,优化养殖生产空间,调整渔业产业结构,培养、引进科技人才等。

广东省大埔县平原稀土矿区矿床地质特征及成因

广东省大埔县平原稀土矿区稀土矿储存于大埔岩体风化壳中,具有成矿条件优异的特点,为降低稀土矿资源开采难度,本文基于梅州润达投资开发有限公司的探矿情况,先对矿区地质特征、矿床地质特征加以研究,然后分析矿区成矿规律,查明矿区成矿地质背景和控矿因素,为后续采矿工作开展,提供了可靠的资料支持。希望通过本文研究,为平原稀土矿区资源开采工作的高质量推进提供参考。

河北省平原区2018—2021年地下水动态变化研究

为了科学推进地下水超采治理,掌握河北省平原区地下水动态变化情况,以河北省平原区地下水自动监测站监测数据为基础,时间段为2018—2021年,以14个地市行政区浅、深层地下水动态变化和地下水超采为研究内容,分析了地下水位变化影响的因素,提出了缓解河北省平原区地下水水位下降的建议,为河北省平原区地下水综合治理提供支撑。